html,body{height:100%;overflow: hidden;}
body{
    background:url('../image/login-bg.jpg') no-repeat fixed;
    background-size: cover;
    width: 100%;
    height: 100%;
}

.footer{position: absolute;bottom:20px;text-align:center;width:100%;font-size:14px;color:rgba(0,0,0,0.8);color:#fff}